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69 lines
1.5 KiB
Java
69 lines
1.5 KiB
Java
Border layout demo
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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public class BorderLayoutDemo extends JFrame
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implements ActionListener {
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private JButton b[];
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private String names[] =
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{ "Hide North", "Hide South", "Hide East",
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"Hide West", "Hide Center" };
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private BorderLayout layout;
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public BorderLayoutDemo()
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{
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super( "BorderLayout Demo" );
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layout = new BorderLayout( 5, 5 );
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Container c = getContentPane();
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c.setLayout( layout );
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// instantiate button objects
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b = new JButton[ names.length ];
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for ( int i = 0; i < names.length; i++ ) {
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b[ i ] = new JButton( names[ i ] );
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b[ i ].addActionListener( this );
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}
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// order not important
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c.add( b[ 0 ], BorderLayout.NORTH ); // North position
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c.add( b[ 1 ], BorderLayout.SOUTH ); // South position
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c.add( b[ 2 ], BorderLayout.EAST ); // East position
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c.add( b[ 3 ], BorderLayout.WEST ); // West position
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c.add( b[ 4 ], BorderLayout.CENTER ); // Center position
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setSize( 300, 200 );
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show();
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}
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public void actionPerformed( ActionEvent e )
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{
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for ( int i = 0; i < b.length; i++ )
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if ( e.getSource() == b[ i ] )
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b[ i ].setVisible( false );
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else
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b[ i ].setVisible( true );
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// re-layout the content pane
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layout.layoutContainer( getContentPane() );
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}
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public static void main( String args[] )
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{
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BorderLayoutDemo app = new BorderLayoutDemo();
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app.addWindowListener(
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new WindowAdapter() {
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public void windowClosing( WindowEvent e )
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{
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System.exit( 0 );
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}
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}
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);
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}
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}
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